package com.htgd.gardenexpo.controller;

import com.alibaba.fastjson.JSONObject;
import com.htgd.gardenexpo.entity.CommonResult;
import com.htgd.gardenexpo.vo.Config;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.UUID;

@RestController
@RequestMapping("/api/wxJs")
@Api( tags = "微信JS")
@Slf4j
public class WxJSController {

    @Value("${wx.public.appId}")
    public String appId;

    @Value("${wx.public.appsecret}")
    public String appsecret;


    @GetMapping("/getAccessToken")
    public String getAccessToken() {
        String access_token = "";
        String grant_type = "client_credential";//获取access_token填写client_credential
        String AppId= "wx0fcf0ccef1bc3dfe";//第三方用户唯一凭证
        String secret= "eb97df403b873b64102db2bc6b311374";//第三方用户唯一凭证密钥，即appsecret
        //这个url链接地址和参数皆不能变
        String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type="+grant_type+"&appid="+AppId+"&secret="+secret;

        try {
            URL urlGet = new URL(url);
            HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
            http.setRequestMethod("GET"); // 必须是get方式请求
            http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
            http.setDoOutput(true);
            http.setDoInput(true);
            System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 连接超时30秒
            System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒
            http.connect();
            InputStream is = http.getInputStream();
            int size = is.available();
            byte[] jsonBytes = new byte[size];
            is.read(jsonBytes);
            String message = new String(jsonBytes, "UTF-8");
            JSONObject demoJson = JSONObject.parseObject(message);
            System.out.println("JSON字符串："+demoJson);
            access_token = demoJson.getString("access_token");
            is.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return access_token;
    }

    @GetMapping("/getTicket")
    public String getTicket(String access_token) {
        String ticket = null;
        String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="+ access_token +"&type=jsapi";//这个url链接和参数不能变
        try {
            URL urlGet = new URL(url);
            HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
            http.setRequestMethod("GET"); // 必须是get方式请求
            http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
            http.setDoOutput(true);
            http.setDoInput(true);
            System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 连接超时30秒
            System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒
            http.connect();
            InputStream is = http.getInputStream();
            int size = is.available();
            byte[] jsonBytes = new byte[size];
            is.read(jsonBytes);
            String message = new String(jsonBytes, "UTF-8");
            JSONObject demoJson = JSONObject.parseObject(message);
            System.out.println("JSON字符串："+demoJson);
            ticket = demoJson.getString("ticket");
            is.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ticket;
    }

    @GetMapping("/SHA1")
    public String SHA1(String decript) {
        try {
            MessageDigest digest = java.security.MessageDigest.getInstance("SHA-1");
            digest.update(decript.getBytes());
            byte messageDigest[] = digest.digest();
            // Create Hex String
            StringBuffer hexString = new StringBuffer();
            // 字节数组转换为 十六进制 数
            for (int i = 0; i < messageDigest.length; i++) {
                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
                if (shaHex.length() < 2) {
                    hexString.append(0);
                }
                hexString.append(shaHex);
            }
            return hexString.toString();

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }

    @GetMapping("/getConfig")
    public CommonResult<Config> getConfig(String url) {
        CommonResult<Config> result = new CommonResult<>();
        try {
            Config config = new Config();
            //1、获取AccessToken
            String accessToken = getAccessToken();

            //2、获取Ticket
            String jsapi_ticket = getTicket(accessToken);

            //3、时间戳和随机字符串
            String noncestr = UUID.randomUUID().toString().replace("-", "").substring(0, 16);//随机字符串
            String timestamp = String.valueOf(System.currentTimeMillis() / 1000);//时间戳

            System.out.println("accessToken:"+accessToken+"\njsapi_ticket:"+jsapi_ticket+"\n时间戳："+timestamp+"\n随机字符串："+noncestr);

//        //4、获取url
//        String url="http://www.luiyang.com/add.html";
////    /*根据JSSDK上面的规则进行计算，这里比较简单，我就手动写啦
////    String[] ArrTmp = {"jsapi_ticket","timestamp","nonce","url"};
////    Arrays.sort(ArrTmp);
////    StringBuffer sf = new StringBuffer();
////    for(int i=0;i<ArrTmp.length;i++){
////        sf.append(ArrTmp[i]);
////    }
//    */

            //5、将参数排序并拼接字符串
            String str = "jsapi_ticket="+jsapi_ticket+"&noncestr="+noncestr+"&timestamp="+timestamp+"&url="+url;

            //6、将字符串进行sha1加密
            String signature =SHA1(str);
            System.out.println("参数："+str+"\n签名："+signature);

            config.setSignature(signature);
            config.setTimestamp(timestamp);
            config.setNonceStr(noncestr);
            config.setJsapi_ticket(jsapi_ticket);

            result.setCode(200);
            result.setData(config);
        }catch (Exception e){
            result.setCode(500);
            result.setMessage(e.toString());
        }
        return result;

    }
}
